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Sasanami Caldera Ikawa and Imaoka, 2001

• Collapse caldera (piecemeal-type)
• Volcanic rocks
• Late Cretaceous

• Distribution (East-West): 17 km
• Distribution (South-North): 14 km

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Sasanami, Hagi city, Yamaguchi pref.

• Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI